Allow new lines in chained method invocation (fixes #287)

adambeynon · adambeynon · commit cc8e94233201 · 2013-07-29T21:23:32.000+01:00
diff --git a/lib/opal/lexer.rb b/lib/opal/lexer.rb
@@ -289,6 +289,13 @@ def next_token
 
           next if [:expr_beg, :expr_dot].include? @lex_state
 
+          if scanner.scan(/([\ \t\r\f\v]*)\./)
+            space_seen = true unless scanner[1].empty?
+            scanner.pos = scanner.pos - 1
+
+            next unless scanner.check(/\.\./)
+          end
+
           cmd_start = true
           @lex_state = :expr_beg
           return '\\n', '\\n'
diff --git a/spec/parser/call_spec.rb b/spec/parser/call_spec.rb
@@ -18,6 +18,11 @@
     opal_parse("foo 1, 2").should == [:call, nil, :foo, [:arglist, [:lit, 1], [:lit, 2]]]
     opal_parse("foo 1, *2").should == [:call, nil, :foo, [:arglist, [:lit, 1], [:splat, [:lit, 2]]]]
   end
+
+  it "supports leading dots on newline" do
+    opal_parse("foo\n.bar").should == [:call, [:call, nil, :foo, [:arglist]], :bar, [:arglist]]
+    lambda { opal_parse("foo\n..bar") }.should raise_error(Exception)
+  end
 end
 
 describe "Operator calls" do
